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Budi Hartono Setiamarga
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Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PACK CARBURIZING PADA SPROCKET SEPEDA MOTOR DENGAN MATERIAL BAJA KARBON RENDAH Budi Hartono Setiamarga; Novi Kurniawati; Umen Rumendi
Mesin Vol. 21 No. 1 (2006)
Publisher : Mesin

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Abstract

High quality motorcycle sprocket with cheaper price has been achieved by giving additional processing to non original locally made sprocket such that it has an almost the same quality as the original Japanese made sprocket . The additional processing was pack carburizing which was done to the non-original sprocket, followed by quench hardening and tempering so that the quality of the non-original sprocket will be almost the same as the original sprocket. Pack carburizing was applied with active carbon as the carbon source and 10% BaCO3 as the energizer. This process was done at 950°C and one hour holding time. For heat treatment, the heating was done at 850°C for 15 minutes, followed by water quenching and tempering at 150°C for 30 minutes. The carburizing result indicated that there was a carbon penetration depth of about 1.05 mm. After tempering, an effective case depth of about 0.2 mm was achieved. The process variables for obtaining an effective case depth of original sprocket (0.2 mm) are selected by applying pack carburizing using active carbon granule with 10%wt BaCO3 as the carburizing medium, processed at 950°C for an hour, followed by water quenching from 850°C and tempering at 150°C for 30 minutes.
THE EFFECT OF HEAT TREATMENT AND SURFACE ANODIZATION ON FRICTION AND WEAR COEFFICIENT OF ALUMINIUM 2024 USING PIN ON DISK METHOD Tiya Khairina Izzati; Aristo Nugraha Putra; Budi Hartono Setiamarga; Yorinah Sarah Francoise Lantang
Metalurgi Vol 37, No 1 (2022): Metalurgi Vol. 37 No. 1 April 2022
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.083 KB) | DOI: 10.14203/metalurgi.v37i1.620

Abstract

The use of aluminum alloys as a material for engineering components that rub against each other is increasing, so it is important to know the friction characteristics of these aluminum alloys.  In this study, Aluminum 2024 was given heat treatment with variation in aging time and anodization. Then, the wear and friction coefficient tests were carried out using a pin tool on the disc. The effect of aging time and surface anodization on wear tests are carried out to determine the amount of wear and the coefficient of friction test is carried out to determine the coefficient of friction of the material when it rubs against a pin made of AISI 52100 Steel. The coefficient of friction test is carried out by adding lubrication as a parameter. The test results showed that the aluminum material given heat treatment had better resistance than that which was not heat treated. This is because the heat treatment creates precipitates that can increase the aluminum's hardness and wear resistance. Whereas for anodized specimens, the alumina layer can act as an abrasive grain when given a high enough friction and load continuously, so the wear testing mode changes from dry sliding wear to three body abrasive wear and decreased wear resistance. From the friction coefficient test results, the aging time affects the hardness of the aluminum alloy, which leads to the value of the coefficient of friction. The harder the sample surface, the smaller the coefficient of friction obtained. Furthermore, applying lubricant to the sample will also decrease the value of the friction coefficient of the sample. Lubricating oil will provide a more significant reduction in friction coefficient than air. Finally, the anodizing surface on the sample will act as a lubricant reservoir when it occurs.
Co-Authors Aristo Nugraha Putra Novi Kurniawati Tiya Khairina Izzati Umen Rumendi Yorinah Sarah Francoise Lantang